5. Extralife Radio
One of the most fun weekly audio podcasts online today. Hosted by Scott Johnson, ELR covers everything Geek. From comic books to computer games, movies to toilet humor. Scott Johnson also hosts a number of other podcasts which can be found here. But I thought it would be unfair to name more than one in this post, even though they are all great quality.
Other great podcast suggestions are to be found at the source. Thanks, Crimson Fox!